CN203568939U

CN203568939U - Agricultural non-point source pollution control system

Info

Publication number: CN203568939U
Application number: CN201320604168.4U
Authority: CN
Inventors: 滕昆辰
Original assignee: NANJING HONGBO ENVIRONMENTAL PROTECTION INDUSTRIAL Co Ltd
Current assignee: NANJING HONGBO ENVIRONMENTAL PROTECTION INDUSTRIAL Co Ltd
Priority date: 2013-09-27
Filing date: 2013-09-27
Publication date: 2014-04-30
Anticipated expiration: 2023-09-27

Abstract

The utility model relates to an agricultural non-point source pollution control system which is formed by sequentially connecting a catch basin, an ecological interception ditch, an ecological purification ditch and an ecological system combined purification creek branch, wherein a slope of the catch basin in a place with water depth of 1-2.2m is 1:20, so that a guarantee is provided for growth and reproduction of an aquatic plant; the ecological purification ditch simulates a natural ecological revetment and a pan-bottom-shaped pond bottom, so that respective appropriate places can be provided for diversified organisms, and the self-purification capacity of a water body can be kept for a long time; and the depth of the pan-bottom-shaped pond bottom is 2.5-3.5m, so that self-succession of diversified submerged plants is facilitated, and the self-purification capacity of the water body can be kept for a long time. The system fully exerts the advantage of energy cycling, achieves agricultural non-point source pollution control, and facilitates sustainable development of agro-ecology.

Description

A kind of Control of Agricultural Non-point Source Pollution system

Technical field

The utility model relates to the controlling area-source pollution system in environmental engineering, relates in particular to a kind of Control of Agricultural Non-point Source Pollution system.

Background technology

Development along with intensive agricultural, widespread pollution from the overuse of fertilizers and pesticides in rural area has become the outstanding problem in agricultural development, other pollutents such as the nitrogen in Agricultural Activities, phosphorus, agricultural chemicals and livestock and poultry breeding industry sewage, by earth's surface seepage, cause groundwater environment to worsen, not only impact is produced and domestic water, also easily cause epidemic disease, cause serious social danger.Existing Ecosystem restoration system, can alleviate widespread pollution from the overuse of fertilizers and pesticides in rural area problem to a certain extent, but in scheme application, ubiquity " is cured the symptoms, not the disease ", cost is large, effect is little, the easy problem such as deterioration repeatedly, can only temporarily purify water, and can not fundamentally solve environmental pollution.

Utility model content

The purpose of this utility model is to administer widespread pollution from the overuse of fertilizers and pesticides in rural area, and degradable organic pollutant, removes nitrogen in sewage; the nutritive substances such as phosphorus, eliminate body eutrophication and threaten, and preserve the ecological environment; improve Regional Water Environment, realize the resource utilization development and utilization of water, realize Sustainable development.

The technical scheme that realizes the utility model object is: a kind of Control of Agricultural Non-point Source Pollution system, by charge for remittance ditch, ecological intercepting canal, ecological purification canal, ecosystem combination purification, prop up creek and connect to form successively, agriculture production draining is collected and is entered ecological intercepting canal by charge for remittance ditch, by material absorption such as nitrogen, phosphorus, pass through again ecological purification canal, sewage is further purified, and finally by crossing after ecosystem combination purification props up creek, by farmland, is recycled.

As prioritization scheme of the present utility model, charge for remittance ditch is 1:20 in 1～2.2 meter of gradient of the depth of water, for the growth and breeding of waterplant provides guarantee.

As prioritization scheme of the present utility model, ecological purification canal forms at the bottom of by ecological revetment and the pot bottom type pool, meets ecological principle, for diversity biology provides suitable existence place.

As prioritization scheme of the present utility model, at the bottom of the pot bottom type pool, the degree of depth is 2.5～3.5 meters, is conducive to the self-succession of diversity submerged plant, keeps for a long time the self-purification capacity of water body.

The utlity model has positive effect: the utility model technology is given full play to the advantage of energy cycle, by repairing, renovate water body in construction ecological intercepting ditch and ditch, circulate, by aquatic plant purification water body, form the ecological recycle system of water body natural purification.Slow down water speed, promote particulate matter precipitation, reduction rate to pollutent nitrogen phosphorus reaches more than 40%, realize the efficient circulation of energy, pollutent is got back to nature after being absorbed decomposition by animals and plants again, do not destroying under ecosystem equilibrium conditions, fundamentally solve widespread pollution from the overuse of fertilizers and pesticides in rural area problem, there is good economy, ecology and social benefit.

Accompanying drawing explanation

For content of the present utility model is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail below:

Fig. 1 is structured flowchart of the present utility model.

Embodiment

As shown in Figure 1, the utility model is a kind of Control of Agricultural Non-point Source Pollution system, below in conjunction with accompanying drawing, working mechanism of the present utility model is described further.Control to widespread pollution from the overuse of fertilizers and pesticides in rural area, the method for employing " control source throttling ", source measure of control mainly contain: the one, the control of agricultural chemicals, chemical fertilizer, reduces applying quantity of chemical fertilizer; The 2nd, the control of feces of livestock and poultry; The 3rd, the control in farmland.Then at pollutent in the process of channel migration, hold back and remove, reach the object of purification.Agricultural drainage is collected and is entered ecological intercepting canal by charge for remittance ditch, while building charge for remittance ditch, hard revetment is transformed into steppedly, in ladder, covers a small amount of soil, according to water level just choose seeds respectively floatingleaved plant, emergent, as water caltrop, battalion Pu etc., also can adopt permeable gaily decorated basket earthing to plant.Make up hard revetment emergent, the ecological omission of hygrophyte, thereby purify water, improve water transparency, in plant rhizosphere district, be formed with the microflora that is beneficial to nutritive salt output, effectively organic substance in water of decomposition, between the plant community of Various Seasonal, with suitable area, separate, oneself's succession, the initial stage manually teaches adjustment population structure to develop, and suppresses the overgrowing of indivedual kinds, after whole ecosystem maturation, without Human disturbance, can keep species diversity Stability Analysis of Structures.River course slope protection is constructed, apart from 1 meter of of road surface vertical height, with (particle size range the is chosen in 60-100cm) stone that varies in size, along original revetment gradient, be naturally piled into the step of different depths, then with concrete casting, be fixed, make it enough resist the sluicing of wet season, greatly reduce the impact on discharging capacity in flood season, and fully guaranteed vegeto-animal living environment under different water depth condition; 1～2.2 meter of the depth of water for example 2m according to the gradient of 1:20, existing mud is dug clearly and the work of banketing, for the growth and breeding of river bed submerged plant provides guarantee, further stablize water ecosystem.

Sewage enters ecological intercepting canal through charge for remittance ditch, and ecological intercepting canal, because of the existence of waterplant, has strengthened the detergent power that wetland pollutes water.Aquatic plant purification is mainly by absorption and sorption, degraded, filtration and the allelopathy of plant, and its aquatic plant purification effect comprises:

Sorption: utilize waterplant to absorb the nutritive substances such as nitrogen in water body, phosphorus, finally by hand harvest plant by certain nitrogen, phosphorus band water-outlet body.

Degradation: waterplant provides habitat and attaching substratum for microorganism.Waterplant metabolism accelerates to be trapped in organic colloid around of root system or the decomposition of suspended substance greatly, by gas transmission and the release action of plant branch and root system, increases the dissolved oxygen in water body.

Absorption and filteration: emergent well developed root system, can form intensive hurdle and cut net, insoluble colloid can be adhered to by root system or adsorb and settle down, and organic debris is also adsorbed and filters and deposit.

Allelopathy: waterplant and planktonic algae competition nutrition, illumination, the root system of waterplant can also secrete chemical substance simultaneously, suppresses algal grown.

Ecological intercepting canal system system is grouped into by plant part and engineering department, can slow down the precipitation of water speed, promotion particulate matter, and the reduction rate of pollutent nitrogen phosphorus is reached more than 40%.The nutritive ingredient in draining can well be degraded, be removed to ecological canal system, and the nitrogen phosphorus of controlling farmland drainage runoff enters network of waterways water body.Ecological intercepting canal is dynamic and static removal efficiency of nitrogen and phosphorus is all higher, reaches respectively 35.7%, 41.0% and 58.2%, 84.8%.Along ecological intercepting water in a canal flow path direction kind reed, cattail etc., can hold back a part of nitrogen phosphorus of remittance.The ecological intercepting canal that Itanlian rye is set has stronger removal ability than nature irrigation canals and ditches to nitrogen phosphorus.The ecological intercepting canal that adopts bottom of trench kind waterplant to build, the amount of its Bioaccumulation nitrogen phosphorus is apparently higher than natural irrigation canals and ditches Bioaccumulation amount.But the waterplant in canal absorbs macrometabolic element in the season of growth, and discharge nitrogen phosphorus element winter.If gather in not in time plant, its plant residue discharges the nutrient of absorption again to water body, causes serious secondary pollution.Promotion utilizes economical plant to replace wild-type plant, and guiding people periodical reaping plant, effectively prevents and treats the secondary pollution of plant.Building ecological intercepting canal is a major measure that builds buffer strip, increases the working cycle of pollutent in the ecosystem, reduces pollution substance and exports outside system.Keeping topography and geomorphology, clean into lake just rain pollute, administer the aspects such as pond waters water quality and become effective, entirely ecological collect, osmotic system more can significantly reduce construction costs and engineering difficulty.The interception function of this ecology has important effect for the ecology that prevents pollution of area source, reparation water body, recovery water body.According to the principle that Running water never becomes putrid, realize water body circulation.Whole ecological intercepting canal is rebuild, by design calculation at the bottom of canal and both sides proportioning plantation there is the waterplant of purification, economy and landscape effect, reasonably carry out topography reform, form stage purification system, current are slowed down, enhanced system interception adsorptive power for microorganism and hydrobiont provide carrier and the place of perching, forms ecological intercepting canal simultaneously.By the control to the depth of water, suitable planting aquatic plants, further denitrogenation dephosphorizing, purifies water, and can play again the effect of bank protection, can also produce certain economic return simultaneously.

Sewage enters the ecological purification pool through ecological intercepting canal, the artificial ecosystem is wanted to resist environmental disaster and natural cataclysm, the species such as the interior multiple higher aquatic plants of the ecosystem, animal, microorganism are wanted to carry out self-succession, thereby the aquatic ecosystem of simulating nature circle long term evolution, the amount reproduction of long term inhibition planktonic algae, guarantees water body self-purification ability.Function with the leading species diversity ecosystem performance deep purifying of higher aquatic plants, can keep the above water quality of transparency 1.5m for a long time.The ecological purification pool, at the bottom of the ecological revetment that simulating nature circle long term evolution forms and the pot bottom type pool, section more meets ecological principle, and being conducive to provides optimum existence place separately for diversity biology.2.5～3.5 meters of left and right of the bottom of a pan degree of depth are 3 meters of self-successions that are conducive to diversity submerged plant for example, keep for a long time water body self-purification ability.60% above water water front adopts ecological revetment to be conducive to diversity emergent and hygrophyte oneself succession, for many kinds animal provides habitat, also be the main body of water scenery Characteristic landscape simultaneously, at the bottom of the pool, the multiple submerged plant of plantation is inlayed at interval, more than water transparency 1.5m, build and step on hydrophilic step, open jetty, pleasure-boat is hydrophilic knows that seeing fishes and shrimps walks in forest under water.The multiple emergent of configuration and hygrophyte are inlayed in water front interval, form large color lump and the scale of construction, set off broad lake surface, form the visual space with Ecological Feature.In ecological pond, according to sectorization, plant different waterplant and cash crop, can play the effect of view, can produce certain economic benefit again.

Finally by ecosystem combination purification, propping up creek enters farmland and recycles, at ecosystem combination purification, prop up and in creek, plant multiple waterplant, as both sides and periphery shoaling water, the waterplant of plantation nitrogen phosphorus high adsorption capacity, as iris, yellow flag, Wild Oenanthe, the chrysanthemum fire hose, floating heart, black algae, Herba potamogetonis distincti, water caltrop etc., recover natural Lu Sheng-humidogene ecosystem, sewage is further purified, finally by farmland reuse.

The native system organic pollutant of having degraded, has removed nitrogen in sewage, and the nutritive substances such as phosphorus, have eliminated the threat of body eutrophication.By the self-succession of many species in the ecosystem, water pollutant is adsorbed, absorption, decomposition gasification, migration are taken out, fixing deposition, the annual high-efficient purification ability that keeps.By artificial regulatory species, digestion decrement, guarantees to pollute the treatment effect of degraded, is not destroying under the balance of the ecosystem, has administered cost-effectively the micro-pollution problem of agricultural area source.

Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a Control of Agricultural Non-point Source Pollution system, is characterized in that: described Control of Agricultural Non-point Source Pollution system is propped up creek and is connected in sequence by charge for remittance ditch, ecological intercepting canal, ecological purification canal, ecosystem combination purification; Described ecological intercepting canal one end is communicated with charge for remittance ditch, and the other end is communicated with ecological purification canal; Described ecological purification canal one end is communicated with ecological intercepting canal, and the other end props up creek with ecosystem combination purification and is communicated with.

2. a kind of Control of Agricultural Non-point Source Pollution system according to claim 1, is characterized in that: described charge for remittance ditch is 1:20 in 1～2.2 meter of gradient of the depth of water.

3. a kind of Control of Agricultural Non-point Source Pollution system according to claim 1 and 2, is characterized in that: described ecological purification canal forms at the bottom of by ecological revetment and the pot bottom type pool.

4. a kind of Control of Agricultural Non-point Source Pollution system according to claim 3, is characterized in that: at the bottom of the described pot bottom type pool, the degree of depth is 2.5～3.5 meters.